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CA2343057A1 - Method and system for alternating transmission of codec mode information - Google Patents

Method and system for alternating transmission of codec mode information Download PDF

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Publication number
CA2343057A1
CA2343057A1 CA002343057A CA2343057A CA2343057A1 CA 2343057 A1 CA2343057 A1 CA 2343057A1 CA 002343057 A CA002343057 A CA 002343057A CA 2343057 A CA2343057 A CA 2343057A CA 2343057 A1 CA2343057 A1 CA 2343057A1
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CA
Canada
Prior art keywords
information
mode
frame
link
transmitting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002343057A
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French (fr)
Other versions
CA2343057C (en
Inventor
Stefan Bruhn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
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Individual
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Filing date
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Application filed by Individual filed Critical Individual
Publication of CA2343057A1 publication Critical patent/CA2343057A1/en
Application granted granted Critical
Publication of CA2343057C publication Critical patent/CA2343057C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0072—Error control for data other than payload data, e.g. control data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025—Transmission of mode-switching indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028—Formatting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0014—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the source coding

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Communication Control (AREA)

Abstract

A communication system supports multiple source coding/channel coding schemes.
A mode indicator can be transmitted with payload data to inform the receiver of the particular scheme currently being employed. Similarly, a mode request can be transmitted to inform the receiver of a particular scheme to be employed for information to be transmitted on the return radio link. The rate of change of the mode indications and mode requests can be decimated so that they need not both be transmitted in each frame to thereby reduce the overhead capacity consumption associated with the transmission of mode information.
According to one exemplary embodiment, the mode indication and the mode request can be tramsmitted independently on alternating frames.

Claims (56)

WHAT IS CLAIMED IS:
1. A method for transmitting information on a first link and receiving information on a second link in a communication system comprising the steps of:
providing at least two different codec modes for processing said information in said system;
transmitting, in at least one first frame on said first link, a mode indication identifying one of said at least two different codec modes which has been used to process said first frame of data; and transmitting, in at least one second frame on said first link different than said first frame, a mode request identifying one of said at least two different codec modes to be used to process information to be transmitted on said second link.
2. The method of claim 1, wherein each of said at least two codec modes identify both a source coding technique and a channel coding technique.
3. The method of claim 1, wherein said mode request is channel measurement information which can be used by a transceiver to determine an appropriate one of said at least two different codec modes for processing information to be transmitted on said second link.
4. The method of claim 1, wherein said at least one first and second frames are consecutively transmitted.
5. The method of claim 1, wherein said first step of transmitting further comprises the step of:
transmitting said mode indication in said at least one first frame including frames (n/2+l...n)+k*n, where k is an incremental frame number and n is an integer.
6. The method of claim 5, wherein said second step of transmitting further comprises the step of:

transmitting said mode request information in said at least one second frame including frames (l...n/2)+k*n, where k is an incremental frame number and n is an integer.
7. The method of claim 1, wherein said at least one first and second frames are even and odd frames.
8. The method of claim 7, wherein said at least one first frame comprises two consecutive, evenly numbered frames.
9. The method of claim 7, wherein said at least one second frame comprises two consecutive, oddly numbered frames.
10. The method of claim 1, further comprising the step of:
synchronizing said first and second transmitting steps to a time frame structure of other information transmitted by said communication system.
11. The method of claim 10, wherein said time frame structure is a slow associated control channel (SACCH) structure.
12. A system for transmitting information on a first link and receiving information on a second link in a communication system comprising the steps of:
means for providing at least two different codec modes for processing said information in said system;
means for transmitting, in at least one first frame on said first link, a mode indication identifying one of said at least two different codec modes which has been used to process said first frame of data; and means for transmitting, in at least one second frame on said first link different than said first frame, a mode request identifying one of said at least two different codec modes to be used to process information to be transmitted on said second link.
13. The system of claim 12, wherein each of said at least two codec modes identify both a source coding technique and a channel coding technique.
14. The system of claim 12, wherein said mode request is channel measurement information which can be used by a transceiver to determine an appropriate one of said at least two different codec modes for processing information to be transmitted on said second link.
15. The system of claim 12, wherein said at least one first and second frames are consecutively transmitted.
16. The system of claim 12, wherein said first means for transmitting further comprises:
means for transmitting said mode indication in said at least one first frame including frames (n/2+1...n)+k*n, where k is an incremental frame number and n is an integer.
17. The system of claim 16, wherein said second means for transmitting further composes:
means for transmitting said mode request information in said at least one second frame including frames (1...n/2)+k*n, where k is an incremental frame number and n is an integer.
18. The system of claim 12, wherein said at least one first and second frames are even and odd frames.
19. The system of claim 18, wherein said at least one first frame comprises two consecutive, evenly numbered frames.
20. The system of claim 18, wherein said at least one second frame comprises two consecutive, oddly numbered frames.
2i. The system of claim 12, further comprising:
means for synchronizing said first and second transmitting means to a time frame structure of other information transmitted by said communication system.
22. The system of claim 21, wherein said time frame structure is a slow associated control channel (SACCH) structure.
23. A communication station comprising:
a processor for processing payload information and mode indication and request information; and a transmitter for receiving said payload information, said mode indication information and said mode request information from said processor and for selectively transmitting one of said mode indication information and said mode request information in each frame in addition to said payload information on a first communication link.
24. The communication station of claim 23, further comprising:
a receiver for receiving mode indication information, mode request information and payload information on a second communication link, wherein said mode indication information is used by said processor to decode said payload information and said mode request information is used to determine a coding mode for said payload information transmitted by said transmitter.
25. The communication station of claim 23, wherein said processor selectively adapts transmission of said mode indication information based upon incoming payload information.
26. The method of claim 1, further comprising the steps of:
determining that a data source associated with said first link is inactive;
and halting the transmission of said mode indications in said at least one first frame during a period when said data source is inactive.
27. The method of claim 26, further comprising the step of:
transmitting said mode requests both during said at least one first and second frame during said period of inactivity.
28. The method of claim 26, further comprising the step of:
using a predetermined n-th most robust one of said at least two different code modes to process said information for transmission on said first link after said period of inactivity has ended.
29. The method of claim 26, further comprising the step of:
using a codec mode which was used prior to said period of inactivity to process said information for transmission on said first link after said period of inactivity has ended.
30. The method of claim 26, further comprising the step of:
using a codec mode which is n modes more robust than a codec mode employed immediately before said period of inactivity to process said information for transmission after said period of inactivity has ended.
31. The system of claim 12, further comprising:
means for determining that a data source associated with said first link is inactive; and means for halting the transmission of said mode indications in said at least one first frame during a period when said data source is inactive.
32. The system of claim 31, further comprising:
means for transmitting said mode request during both said at least one first and second frames during said period of inactivity.
33. The system of claim 31, further comprising:
means for using a predetermined n-th most robust one of said at least two different code modes to process said information for transmission on said first link after said period of inactivity has ended.
34. The system of claim 31, further comprising:

means for using a codes mode which was used prior to said period of inactivity to process said information for transmission on said first link after said period of inactivity has ended.
35. The system of claim 31, further comprising:
means for using a codes mode which is n modes more robust than a codes mode employed immediately before said period of inactivity to process said information for transmission after said period of inactivity has ended.
36. A method for receiving information on a first link in a communication system comprising the steps of:

providing at least two different codes modes for processing said information in said system;

receiving, in at least one first frame on said first link, a mode indication identifying one of said at least two different codes modes which has been used to process payload data; and receiving, in at least one second frame on said first link different than said first frame, a mode request identifying one of said at least two different codes modes to be used to process information to be transmitted on a second link.
37. The method of claim 36, wherein each of said at least two codes modes identify both a source coding technique and a channel coding technique.
38. The method of claim 36; wherein said payload data is contained in a same received frame as said mode indication.
39. The method of claim 36, wherein said payload data is contained in a subsequent received frame different than said at least one first frame including said mode indication.
40. The method of claim 36, further comprising the steps of:
processing said payload data based on said received mode indication; and during said at least one second frame, continuing to process additional payload data based on a previously received mode indication.
41. The method of claim 1, wherein said first step of transmitting further comprises the step of:
transmitting said mode indication in said at least one first frame including frames (1...n/2)*2 +k*n, where k is an incremental frame number and n is an integer.
42. The method of claim 41, wherein said second step of transmitting further comprises the step of:
transmitting said mode request information in said at least one second frame including frames 2*(1...n/2)-1+k*n, where k is an incremental frame number and n is an integer.
43. The system of claim 12, wherein said first means for transmitting further comprises:
means for transmitting said mode indication in said at least one first frame including frames (1...n/2)*2 +k*n, where k is an incremental frame number and n is an integer.
44. The system of claim 43, wherein said second means for transmitting further comprises:
means for transmitting said mode request information in said at least one second frame including frames 2*(1...n/2)-1+k*n, where k is an incremental frame number and n is an integer.
45. The method of claim 36, further comprising the steps of:
determining that a data source associated with said first link is inactive;
and halting transmission of mode requests on said second link during a period when said data source is inactive.
46. The method of claim 45, further comprising the step of:

transmitting mode indications on said second link both during said at least one first and second frame during said period of inactivity.
47. The method of claim 26, further comprising the step of:
using a codec mode which is n modes more robust than a codec mode used on said second link to process said information for transmission after said period of inactivity has ended.
48. The system of claim 26, further comprising:
means for receiving mode indications in every frame on said second link during said period of inactivity on said first link.
49. The system of claim 31, further comprising:
means for using a codec mode which is n modes more robust than a codec mode used on said second link to process said information for transmission after said period of inactivity has ended.
50. The method of claim 36, further comprising the steps of:
transmitting information on said second link, which information is processed in accordance with said received mode requests; and during said at least one first frame, continuing to process said information to be transmitted on said second link based on a previously received mode request.
51. The method of claim 1, wherein said at least one first and second frames are time frames associated with a time division multiple access (TDMA) structure.
52. The system of claim 12, wherein said at least one first and second frames are time frames associated with a time division multiple access (TDMA) structure.
53. The method of claim 26, further comprising the step of:
using a codec mode which is the same as a codec mode used on said second link to process said information for transmission after said period of inactivity has ended.
54. The system of claim 31, further comprising:
means for using a codec mode which is the same as a codec mode used on said second link to process said information for transmission after said period of inactivity has ended.
55. The method of claim 1, wherein said at least one first and second frames are time frames associated with the time frame structure of the employed source and channel coding processing.
56. The system of claim 12, wherein said at least one first and second time frames are time frames associated with the time frame structure of the employed source and channel coding processing.
CA2343057A 1998-09-16 1999-09-03 Method and system for alternating transmission of codec mode information Expired - Lifetime CA2343057C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/154,046 1998-09-16
US09/154,046 US6452941B1 (en) 1998-09-16 1998-09-16 Method and system for alternating transmission of codec mode information
PCT/SE1999/001538 WO2000016513A1 (en) 1998-09-16 1999-09-03 Method and system for alternating transmission of codec mode information

Publications (2)

Publication Number Publication Date
CA2343057A1 true CA2343057A1 (en) 2000-03-23
CA2343057C CA2343057C (en) 2012-03-13

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CA2343057A Expired - Lifetime CA2343057C (en) 1998-09-16 1999-09-03 Method and system for alternating transmission of codec mode information

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US (1) US6452941B1 (en)
EP (2) EP2262153A3 (en)
JP (1) JP3834477B2 (en)
KR (1) KR100669271B1 (en)
CN (1) CN100426716C (en)
AU (1) AU767613B2 (en)
BR (1) BRPI9913758B1 (en)
CA (1) CA2343057C (en)
RU (1) RU2231227C2 (en)
WO (1) WO2000016513A1 (en)
ZA (1) ZA200101998B (en)

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KR20010075123A (en) 2001-08-09
ZA200101998B (en) 2001-09-11
EP1114536A1 (en) 2001-07-11
KR100669271B1 (en) 2007-01-17
CN1337106A (en) 2002-02-20
EP1114536B1 (en) 2016-11-09
RU2231227C2 (en) 2004-06-20
JP3834477B2 (en) 2006-10-18
WO2000016513A1 (en) 2000-03-23
EP2262153A3 (en) 2012-02-08
EP2262153A2 (en) 2010-12-15
CA2343057C (en) 2012-03-13
AU767613B2 (en) 2003-11-20
JP2002525911A (en) 2002-08-13
BRPI9913758B1 (en) 2017-04-25
BR9913758A (en) 2001-06-05
US6452941B1 (en) 2002-09-17
CN100426716C (en) 2008-10-15
AU6376799A (en) 2000-04-03

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